Indebtedness (Senior Credit Facility Narrative) (Details) In Millions, unless otherwise specified		3 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 Revolving Credit Facility [Member] USD ($)	Dec. 31, 2012 Revolving Credit Borrowings US [Member] USD ($)	Dec. 31, 2012 Revolving Credit Borrowings Multi Currency [Member] USD ($)	Dec. 31, 2012 Revolving Credit Borrowings France [Member] USD ($)	Dec. 31, 2012 Revolving Credit Borrowings France [Member] EUR (€)
Debt Instrument [Line Items]
Revolving line of credit, maximum borrowing capacity		$ 750.0	$ 650.0	$ 100.0	$ 10.6	€ 8.0
Line of Credit Facility, Expiration Date		Jul. 19, 2016	Jul. 19, 2016	Jul. 19, 2016	Jul. 19, 2016	Jul. 19, 2016
Revolving credit facility, maximum increase			325	50
Revolver, outstanding borrowings		39.0	0	39.0	7.3	5.6
Letters of credit outstanding	51
Basis spread on variable rate			1.25%	1.25%	1.25%	1.25%
Debt Instrument, Interest Rate, Effective Percentage				1.62%	1.30%	1.30%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.20%	0.20%
Remaining availability under revolving credit facility		$ 376